WO2014115970A1 - Back beam for vehicle having reinforcement part - Google Patents

Abstract

The present invention provides a back beam for vehicle, which includes: a back beam body formed in an arcuate shape and having a predetermined length; and reinforcement parts protruding from a plurality of portions of a front part of the back beam body and spaced apart from each other with intervals gradually varying toward both ends from a central portion of the back beam body.

Description

Back beam for traveling device with reinforcement

The present invention relates to a back beam for a traveling device, and more particularly, to a back beam for a traveling device having a reinforcing part capable of efficiently dispersing collision energy generated during a collision.

In general, the vehicle bumper is installed at the front and rear of the vehicle body to protect the vehicle body and the occupant in the event of various collisions and collisions, as well as to protect the engine and various devices mounted on the hood and engine room.

In addition, the bumper should satisfy the shock requirements according to national regulations, be excellent in high stiffness and impact resistance in a wide temperature range, and should be small in temperature extension.

Such a general vehicle bumper elastically modulates or calibrates the energy at the time of contact with the cushioning member and the cushioning member having a shape restoring function, and the cushioning member forming the bumper outer cover and the bumper cover to maintain the shape and impact of the bumper cover. It consists of a back beam that absorbs through deformation

Since the back beam is formed in the shape of an arch, there is a problem that stress concentration occurs in the center portion during collision. Therefore, there is a problem in that the central portion of the back beam easily breaks upon collision.

In addition, such a back beam is vulnerable to breakage when molded from plastics, and vulnerable to plastic deformation when molded into metals.

SUMMARY OF THE INVENTION An object of the present invention is to provide a back beam for a traveling device having a reinforcing portion capable of efficiently dispersing collision energy generated during a collision.

In a preferred aspect, the present invention is formed into an arch shape and the back beam body having a predetermined length; And a reinforcement part protruding from a plurality of positions of the front part of the back beam body.

Preferably, the reinforcement part protrudes from the front part of the back beam body at a predetermined interval to form a predetermined length along a direction crossing the length direction.

The reinforcement portion is preferably formed of a plurality of buffer ribs protruding from the front portion of the back beam body.

Preferably, the reinforcement part is formed of a plurality of buffer protrusions protruding from the front part of the back beam body along a line along the gap.

The gap between the buffer ribs is preferably formed to gradually widen along both sides from the center portion of the back beam body.

Preferably, the buffer ribs form a protruding length of 10 mm or more based on the outer surface of the back beam body.

The buffer ribs are preferably formed to be perpendicular to the longitudinal direction of the back beam body.

The buffer ribs are preferably formed along the longitudinal direction of the back beam body and are formed to be spaced apart from each other.

In addition, the reinforcing ribs forming the first reinforcing part has a ratio of width and height having a ratio of 2: 1, and has a length equal to the length of any one of the first reinforcing part or the second reinforcing part. Forming,

The reinforcing ribs forming the second reinforcement part have a ratio of width and height having a ratio of 1: 1, and form a length equal to the length of any one of the first reinforcement part or the second reinforcement part. ,

The spacing between the reinforcing ribs forming the first reinforcing portion forms an interval between 1 and 2 times the width of the reinforcing rib of the first reinforcing portion,

Preferably, the spacing between the reinforcing ribs forming the second reinforcing portion forms a spacing of two times or more relative to the width of the reinforcing rib of the second reinforcing portion.

For example, the reinforcing ribs forming the first reinforcement part may have a horizontal length (10 mm) and a height (5 mm) and a vertical length equal to the vertical length of the back beam body, and the reinforcement ribs forming the second reinforcement part may be horizontally. It is preferable to form a height of 5 mm, a height of 5 mm, and a length equal to the length of the back beam body.

The reinforcing ribs forming the first reinforcing portion may form a gap of 10 mm, and the reinforcing ribs forming the second reinforcing portion may form a gap of 25 mm.

In addition, the gap between the buffer protrusions, it is preferable to be formed to gradually narrow along both sides from the center portion of the back beam body.

In the front portion of the back beam body,

A central region and a pair of side regions located on both sides of the central region,

The reinforcement part includes a first reinforcement part formed in the central area and a second reinforcement part formed in each side area,

The buffer protrusions forming the first reinforcement portion have a size in which a ratio of width: length: height is 2: 2: 1,

The buffer protrusions forming the second reinforcement part have a size in which a ratio of width: length: height is 1: 1: 1,

The buffer protrusions forming the first reinforcement portion may form an interval of twice the horizontal reference of the buffer protrusion forming the first reinforcement portion,

Preferably, the buffer protrusions forming the second reinforcement portion form a distance twice as wide as the horizontal width of the buffer protrusion forming the second reinforcement portion.

For example, the buffer protrusions forming the first reinforcement portion form a size of horizontal (10 mm) * length (10 mm) * height (5 mm), and the buffer protrusions forming the second reinforcement portion are horizontal (5 mm) * length. It is desirable to form a size of (5 mm) * height (5 mm).

Preferably, the buffer protrusions forming the first reinforcement part form a gap of 20 mm, and the buffer protrusions forming the second reinforcement part form a gap of 10 mm.

The reinforcement portion is preferably formed to have a polygonal cross section.

The back beam body is preferably formed of any one of a metal, a high strength plastic, or a composite material.

The present invention has the effect of efficiently dispersing the collision energy generated during the collision.

In addition, the present invention has the effect of efficiently dispersing the stress concentrated at the center portion of the back beam when the back beam collides with the collision surface, thereby effectively preventing breakage of the bumper back beam.

1 is a view showing a back beam for a traveling device having a reinforcing portion of the present invention.

2 is a perspective view showing a back beam for a traveling device having a reinforcing portion of the present invention.

3 is a view showing a back beam for a traveling device with a reinforcing portion of the invention before a crash test.

4 is a view showing a back beam for a traveling device having a reinforcement part of the present invention after a crash test.

5 is a perspective view showing a back beam to which another example of the reinforcement part according to the present invention is applied.

6 is another perspective view showing a back beam to which another example of the reinforcement part according to the present invention is applied.

FIG. 7 is an enlarged perspective view illustrating the symbol I of FIG. 5.

FIG. 8 is an enlarged perspective view illustrating the symbol II of FIG. 5.

Hereinafter, a back beam for a traveling device having a reinforcement part of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a back beam for a traveling device having a reinforcement according to a first embodiment of the present invention.

1 and 2, the back beam for a traveling device of the present invention is composed of a back beam body 100 and a reinforcement part 200.

The back beam body 100 is formed to have a predetermined length and thickness. The back beam body 100 is formed in an arch shape. Therefore, the back beam body 100 is formed in a convex shape to one side.

Both ends of the back beam body 100 may include a crash box 110 for the collision.

The back beam body 100 may be formed of high strength plastic, may be formed of a metal, or may be formed of a composite material.

In addition, the length from the center to one end of the back beam body 100 may be formed of 490mm.

The reinforcement part 200 according to the present invention is integrally formed with the back beam body 100 at the front portion of the back beam body 100.

The reinforcement part 200 is formed to protrude from a plurality of positions of the front portion of the back beam body 100. Protruding lengths of the reinforcement part 200 may be the same.

As shown in FIG. 2, the buffer ribs according to the present invention are formed in a shape perpendicular to the longitudinal direction of the back beam.

The reinforcement part 200 is formed of a plurality of buffer ribs 211 and 221 protruding from the front part of the back beam body 100.

The plurality of buffer ribs 211 and 221 are formed side by side in the direction along the top and bottom at the front portion of the back beam body 100. That is, the plurality of buffer ribs 211 and 221 are formed along a direction crossing the length direction of the back beam body 100, preferably perpendicular to each other.

The plurality of buffer ribs 211 and 221 are formed to protrude from the front portion of the back beam body 100 in a spaced state.

On the other hand, the front portion of the back beam body 100 is formed with a central region (A) and a pair of side regions (B) located on both sides of the central region (A) along the longitudinal direction.

In addition, the reinforcement part 200 may include a first reinforcement part 210 formed in the central area A of the back beam body 100 and a second part formed in each side area B of the back beam body 100. It may be composed of two reinforcing portion 220.

The width of the central area A may be smaller than the width of each side area B. FIG.

In this case, an interval between the first buffer ribs 211 forming the first reinforcement portion 210 formed in the central region A may form a first interval d1. The first interval d1 may be 10 mm.

In addition, an interval between the plurality of second buffer ribs 221 forming the second reinforcement part 220 may form a second interval d2. The second interval d2 may be 25 mm.

Here, the first interval d1 is preferably formed to be narrower than the second interval d2.

Accordingly, the back beam of the present invention allows the gap between the buffer ribs 211 and 221 to be formed more tightly in the central area A of the back beam body 100, compared to the side area B of the back beam body 100. In the event of a collision, stress concentration in the central region A of the backbeam body 100 may be relaxed.

That is, the gap between the buffer ribs 211 and 221 is formed in a shape that gradually widens along the side region along both sides from the center region of the back beam body 100.

In addition, the buffer ribs 211 and 221 may be formed in the same direction as the longitudinal direction of the back beam body 100.

The reinforcing ribs 211 forming the first reinforcement part 210 form a horizontal length (10 mm), a height (5 mm), and a vertical length equal to the vertical length of the back beam body 100.

In addition, the reinforcing ribs 221 forming the second reinforcement part 220 have a horizontal length (5 mm), a height (5 mm), and a vertical length equal to the vertical length of the back beam body 100.

Therefore, the areas of the impact absorbing surfaces of the respective reinforcing ribs 211 and 221 may be formed differently.

The above mentioned width, height and spacing may have a tolerance of ± 2 mm in the above mentioned ratios. The said tolerance assumes the minimum length element 2mm as a lower limit.

Therefore, by forming the protruding height of the reinforcing part 200 to the vicinity of 5mm or 5mm in consideration of the tolerance, when the reinforcing part 200 excessively collides with the external collider, it can be prevented from being bent or broken and lost. .

In summary, the reinforcing rib 211 forming the first reinforcing portion 210 forms a ratio of width and height having a ratio of 2: 1, and the first reinforcing portion 210 or the A vertical length equal to the vertical length of any one of the second reinforcing parts 220 is formed.

The reinforcing ribs 221 forming the second reinforcing part 220 may have a ratio of width and height having a ratio of 1: 1, and the first reinforcing part 210 or the second reinforcing part 220 may be used. To form a vertical length equal to the vertical length of any one of.

In addition, the spacing between the reinforcing ribs 211 forming the first reinforcing portion 210 forms an interval between 1 and 2 times the width of the reinforcing ribs 211 of the first reinforcing portion 210, The spacing between the reinforcing ribs 221 forming the second reinforcing portion 220 is designed to have a spacing greater than twice the width of the reinforcing rib 221 of the second reinforcing portion 220.

Next, the operation of the back beam of the present invention configured as described above will be described.

Figure 3 shows a back beam for a traveling device with a reinforcement part of the invention before a crash test, and Figure 4 shows a back beam for a traveling device with a reinforcement part after a crash test.

Referring to Figure 3, both ends of the back beam body 100 is a state before the crash test in a state that the crash box 110 is installed.

As shown in FIG. 3, the back beam body 100 is collided with the collision surface 10.

Referring to FIG. 4, the central region A of the back beam body 100 may first collide with the collision surface 10 to concentrate stress.

At this time, the first buffer ribs 211 forming the first reinforcing portion 210 formed in the central body (A) collide with the collision surface (10). Therefore, the impact force generated when colliding with the collision surface 10 may be distributed by the plurality of first buffer ribs 211.

In addition, the arch-shaped back beam body 100 forms a state in which the central region A is flattened during collision. The impact force generated by this may be concentrated in the central region A, and a stress concentration phenomenon may occur.

The phenomenon in which the stress is concentrated may be easily alleviated while the impact force is dispersed by the first buffer ribs 211.

In addition, the second buffering ribs 221 of the second reinforcing portion 220 formed in the pair of side regions B also collide with the collision surface 10 sequentially, thereby facilitating the impact force generated by the collision. Can be distributed.

In the present invention, the impact absorbing area of the buffer ribs 211 of the first reinforcing part 210 that first collides with the impact surface 10 is less than the shock absorbing area of the buffer ribs 221 of the second reinforcing part 220. By designing widely, the impact at the time of initial impact can be absorbed mostly in the center region, and can be easily dispersed to both sides.

Next, another example of the reinforcing part according to the present invention will be described.

As described above, the reinforcement part 200 described above with reference to FIGS. 1 to 5 has been representatively described as an example formed in a plurality of rib shapes.

In addition, in addition to the rib shape, the reinforcement part 200 according to the present invention may be any other shape capable of absorbing the impact force at a plurality of positions.

5 and 6 show a back beam to which another example of the reinforcement part according to the invention is applied.

5 and 6, the reinforcement part 300 formed on the front portion of the back beam body 100 may be formed of a plurality of buffer protrusions 311 and 321. The reinforcement part 300 is formed of a first reinforcement part 310 and a second reinforcement part 320.

The buffer protrusions 311 and 321 may be formed of first buffer protrusions 311 forming the first reinforcement part 310 and second buffer protrusions 321 forming the second reinforcement part 320.

The first buffer protrusions 311 are formed in the central region A of the back beam body 100, and the second buffer protrusions 321 are formed in each side region B.

The first and second buffer protrusions 311 and 321 according to the present invention protrude toward the front side of the back beam body 100.

Therefore, the plurality of first and second shock absorbing protrusions 311 and 321 having a hollow inside function to effectively absorb and disperse the impact force during the collision.

As shown in FIGS. 5 and 6, the width of the central region A is greater than the width of each side region B, and as shown in FIGS. 7 and 8, in the central region A, as shown in FIGS. The first gap d1 between the first buffer protrusions 311 to be formed is wider than the second gap d2 between the second buffer protrusions 321 formed at each side region b.

Here, the size of the first buffer protrusion 311 in the central region A is formed to have a width X length X height = 10 mm X 10 mm X 5 mm.

In addition, the size of the second buffer protrusion 321 in the side region is formed to have a width X length X height = 5 mm X 5 mm X 5 mm.

The distance 21 between the first buffering protrusions 311 of the central region A is 20 mm, and the distance between the second buffering protrusions d2 of the side region is 10 mm.

That is, the interval between the buffer protrusions 311 and 321 is formed to gradually narrow along both sides from the center portion of the back beam body 100.

The above mentioned width, length, height and spacing may have a tolerance of ± 2 mm in the above mentioned ratios. The said tolerance assumes the minimum length element 2mm as a lower limit.

The heights of the first and second buffer protrusions 311 and 321 may be formed in the vicinity of 5 mm or 5 mm in consideration of the tolerance, so that when the reinforcement part 300 excessively collides with the external collider, the reinforcement part 300 may be bent or damaged to be lost.

In addition, the interval between the first and second buffer protrusions 311 and 321 is set to about twice as long as the horizontal length of the first and second buffer protrusions 311 and 321 is considered. It is separated to form a space that can be easily removed to the outside.

That is, the damaged buffer protrusions can be solved by lowering the collision absorption force by remaining between the other protrusions on the back beam body.

In summary, the buffer protrusions 311 forming the first reinforcement part 310 form a size having a ratio of width: length: height to 2: 2: 1, and the second reinforcement part 320. The shock absorbing protrusions 321 forming a size form a ratio of width: length: height of 1: 1: 1.

In addition, the buffer protrusions 311 forming the first reinforcement part 310 form an interval of twice the horizontal reference of the buffer protrusion 311 forming the first reinforcement part 310, and the second The buffer protrusions 321 forming the reinforcement part 320 form a distance of twice the horizontal reference of the buffer protrusion 321 forming the second reinforcement part 320.

Referring to the above configuration, the S1 area of the first buffer protrusions 311 in the central region A as a whole collides with the collider with an area larger than the S2 area in the side region B, and during the collision, the back beam body ( It is possible to relax the stress concentration in the central region (A) of 100).

That is, in the present invention, the impact absorption area of the first buffer protrusions 311 is designed to be wider than the shock absorption area of the second buffer protrusions 321, thereby absorbing most of the shock at the time of the first impact in the central region and moving to both sides. It can be made to disperse easily.

Therefore, by using another example of the reinforcement part 300, when the reinforcement part 300 collides with the collision surface 10, the plurality of buffer protrusions 311 and 321 forming the reinforcement part 300 are The impact force can be absorbed at the multipoint absorption site.

Accordingly, the impact force absorbed by each of the buffer protrusions 311 and 321 can be easily dispersed separately in each of the buffer protrusions 311 and 321.

That is, when the back beam collides with the collision surface 10, it is possible to more efficiently prevent the stress from being concentrated in the central region A of the back beam body 100.

On the other hand, in the above, the reinforcing portion according to the present invention has been described as a representative example of the buffer ribs or the buffer projection along the longitudinal direction.

In addition, although not shown in the drawings, the present invention may also include an example in which the reinforcing portion is formed in two or more lines along the longitudinal or transverse direction of the back beam body.

In addition, the reinforcement portion according to the present invention is formed along the horizontal or vertical direction in the front portion of the back beam body, may be formed in a zigzag shape, may be formed in a shape forming a grid with each other.

In the case of being formed on the lattice, the size of the lattice may be formed so that the portion where the stress is concentrated can be made more densely.

Embodiments according to the present invention can efficiently distribute the collision energy generated during the collision.

In addition, the embodiment according to the present invention can effectively prevent the breakage of the bumper back beam by efficiently dispersing the stress concentrated in the center portion of the back beam when the back beam impacts the collision surface.

Claims (12)

A back beam body formed in an arch shape and having a predetermined length; And And a reinforcement part protruding from a plurality of positions of the front part of the back beam body. The method of claim 1, The reinforcement part, The front beam of the back beam body, the back beam for the traveling device, characterized in that protruding at a predetermined interval to achieve a predetermined length along the direction crossing the longitudinal direction. The method of claim 1, The reinforcement part, And a plurality of buffer ribs protruding from the front portion of the back beam body. The method of claim 1, The reinforcement part, A back beam for a traveling device, characterized in that it is formed of a plurality of buffer protrusions protruding from the front portion of the back beam body along the line along the interval. The method of claim 3, wherein The gap between the buffer ribs, The back beam for the traveling device, characterized in that it is formed to gradually widen along both sides from the center portion of the back beam body. The method of claim 3, wherein And the buffer ribs are formed to be perpendicular to the longitudinal direction of the back beam body. The method of claim 3, wherein The buffer ribs, The back beam is formed along the longitudinal direction of the back beam body, the back beam for the traveling device, characterized in that formed at intervals from each other. The method of claim 3, wherein In the front portion of the back beam body, A central region and a pair of side regions located on both sides of the central region, The reinforcement part includes a first reinforcement part formed in the central area and a second reinforcement part formed in each side area, The reinforcing ribs forming the first reinforcement part have a ratio of width and height having a ratio of 2: 1, and form a length equal to the length of either the first reinforcement part or the second reinforcement part. , The reinforcing ribs forming the second reinforcement part have a ratio of width and height having a ratio of 1: 1, and form a length equal to the length of any one of the first reinforcement part or the second reinforcement part. , The spacing between the reinforcing ribs forming the first reinforcing portion forms an interval between 1 and 2 times the width of the reinforcing rib of the first reinforcing portion, The spacing between the reinforcing ribs forming the second reinforcing portion is at least two times the width of the reinforcing ribs of the reinforcing ribs of the second reinforcing portion. The method of claim 4, wherein The gap between the buffer protrusions, The back beam for the traveling device, characterized in that it is formed to gradually narrow along both sides from the center portion of the back beam body. The method of claim 4, wherein In the front portion of the back beam body, A central region and a pair of side regions located on both sides of the central region, The reinforcement part includes a first reinforcement part formed in the central area and a second reinforcement part formed in each side area, The buffer protrusions forming the first reinforcement portion have a size in which a ratio of width: length: height is 2: 2: 1, The buffer protrusions forming the second reinforcement part have a size in which a ratio of width: length: height is 1: 1: 1, The buffer protrusions forming the first reinforcement portion may form an interval of twice the horizontal reference of the buffer protrusion forming the first reinforcement portion, The buffer projections forming the second reinforcement portion back beam for a traveling device, characterized in that to form a distance of twice the horizontal reference of the buffer projection forming the second reinforcement portion. The method of claim 1, The reinforcement part, A back beam for a traveling device, characterized in that it is formed to have a polygonal cross section. The method of claim 1, The back beam body, A back beam for a traveling device, which is formed of any one of metal, high strength plastic, and a composite material.

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